[PATCH RFC 0/6] video: Add UTF-8 support for UEFI applications

[Janne Grunau via B4 Relay]

Andre submitted 2 years ago DM_VIDEO improvements for UEFI applications
using UEFI's EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL but did not follow with
suggested changes. This series takes care of the UTF-8 support which
required to draw symbol and box drawing characters used by UEFI
applications like grub2 and sd-boot correctly.

Compared to Andre's version this version has the following changes:
- use and extend existing conversion functions from lib/charset.c
- convert first to UTF-32 to support the truetype console as well
- conversion is conditional on CONFIG_EFI_LOADER
- use escape sequences in tests as proposed by Heinrich

Link: https://lore.kernel.org/u-boot/20220110005638.21599-1-andre.przywara@arm.com/
Signed-off-by: Janne Grunau <j at jannau.net>
---
Andre Przywara (2):
      efi_selftest: Add international characters test
      efi_selftest: Add box drawing character selftest

Janne Grunau (4):
      lib: charset: Fix utf8_to_utf32_stream() return value doc string
      video: console: Parse UTF-8 character sequences
      lib/charset: Map cp437 low chars (0x01 - 0x1f) from unicode
      efi_selftest: Add symbol character selftest

 drivers/video/console_normal.c             |  6 +++--
 drivers/video/console_rotate.c             | 16 +++++++++-----
 drivers/video/console_truetype.c           |  8 +++----
 drivers/video/vidconsole-uclass.c          | 18 ++++++++++-----
 drivers/video/vidconsole_internal.h        | 15 +++++++++++++
 include/charset.h                          |  4 ++--
 include/cp1250.h                           | 12 ++++++++--
 include/cp437.h                            | 12 ++++++++--
 include/video_console.h                    | 10 +++++----
 lib/charset.c                              |  9 +++++---
 lib/efi_loader/efi_unicode_collation.c     |  2 +-
 lib/efi_selftest/efi_selftest_textoutput.c | 35 ++++++++++++++++++++++++++++++
 12 files changed, 116 insertions(+), 31 deletions(-)
---
base-commit: 866ca972d6c3cabeaf6dbac431e8e08bb30b3c8e
change-id: 20240117-vidconsole-utf8-uefi-fa23b4ac65d6

Best regards,
-- 
Janne Grunau <j at jannau.net>